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onsemi 2SB1203S-H
- Part No.:
- 2SB1203S-H
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Datasheet:
-
2SB1203S-H.pdf
- Description:
- TRANS PNP 50V 5A TP
- Quantity:
- Payment:
- Shipping:
Inventory:9,185
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Product details
Overview
2SB1203S-H from onsemi is a PNP bipolar junction transistor (BJT) designed for high-current switching applications, featuring –50 V VCEO, –5 A IC, low –280 mV typical VCE(sat) at –3 A/–0.15 A, 180 MHz fT, and SC-64 (TP) package. It serves as a robust power switch in relay drivers and DC-DC converters.
For engineers reviewing the 2SB1203S-H datasheet, pinout, applications, or equivalent options, key selection criteria include verified PNP polarity, TO-251-compatible TP package mechanical fit, guaranteed –50 V breakdown rating, and halogen-free/Pb-free compliance per ordering suffix -H.
Technical Context
This PNP transistor operates with reverse-polarity voltage ratings and current flow: VCBO = –60 V, VCEO = –50 V, VEBO = –6 V, and supports pulsed collector current up to –8 A. Its fT of 180 MHz enables fast switching in inverters and motor control stages.
Electrical behavior is characterized by excellent hFE linearity across IC (70–400 at –0.5 A and –4 A), low output capacitance (40 pF Cob), and tight VCE(sat) distribution (–220 to –400 mV) under –3 A drive-critical for thermal management in high-duty-cycle switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | –50 V - Maximum safe collector-emitter voltage before avalanche in PNP configuration |
| IC | –5 A - Continuous DC collector current rating defining maximum load-handling capability |
| VCE(sat) | –220 to –400 mV - Low saturation voltage ensures <0.4 W conduction loss at –3 A, reducing heatsink requirements |
| fT | 180 MHz - Gain-bandwidth product enabling reliable operation up to ~20 MHz switching frequencies |
| hFE | 70–400 - Wide DC current gain range supports stable biasing across production lots and temperature (–25°C to 75°C) |
| Cob | 40 pF - Low output capacitance minimizes switching energy loss and improves turn-off speed |
| Package | SC-64 / TO-251 (TP) - Surface-mount, 4-pin single-transistor outline with exposed collector tab for thermal transfer |
Pinout & Package
2SB1203S-H uses the TP (SC-64/TO-251) package: 4-pin surface-mount outline with dual collector terminals (pins 2 and 4), base (pin 1), and emitter (pin 3). The exposed collector pad provides low-thermal-resistance path to PCB copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Base | Control input requiring –0.15 A base drive for full –3 A saturation; low VBE(sat) (–0.95 to –1.3 V) eases driver design |
| 2 | Collector | Main high-current output node; electrically tied to pin 4 and exposed metal tab for thermal and electrical connection |
| 3 | Emitter | Reference terminal for PNP operation; connected to higher potential rail in high-side switch configurations |
| 4 | Collector | Second collector terminal-parallel-connected to pin 2 to reduce bondwire inductance and improve current sharing |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | –220 mV typical at –3 A reduces conduction loss by >30% vs. standard PNP transistors with >–500 mV saturation |
| High fT | 180 MHz enables clean square-wave switching up to 20 MHz without gain roll-off-induced distortion |
| hFE linearity | Consistent gain across IC range (70–400) simplifies bias network design and improves current-source accuracy |
| Fast switching | 50 ns turn-on, 500 ns storage, and 20 ns fall time support <100 ns total switching cycles in SMPS and inverters |
| Pb-free & halogen-free | H-suffix confirms full compliance with JESD204B and IEC 61249-2-21, eliminating Br/Cl content in mold compound and terminations |
Applications
| Relay Drivers | DC-DC Converters |
|---|---|
|
Use Scenario: Driving 12 V/24 V electromagnetic relays in industrial PLC I/O modules requiring >2 A coil current. IC Role / Device Role / Timing Role: High-current PNP switch sinking relay coil current to ground while isolating control logic from inductive kickback. Use Value: –280 mV typical VCE(sat) limits relay-driver power dissipation to <0.84 W at 3 A, enabling compact layout without forced air cooling. |
Use Scenario: Synchronous rectification or high-side switching in 12 V input, 5 V/3 A buck converters for embedded power supplies. IC Role / Device Role / Timing Role: PNP high-side switch controlling main power path; paired with NPN complement (e.g., 2SD1203T-H) in push-pull topology. Use Value: 180 MHz fT and 20 ns fall time ensure minimal dead-time loss and <5% efficiency penalty at 500 kHz switching frequency. |
| Motor Control Stages | Industrial Inverters |
|
Use Scenario: Half-bridge upper-leg switch in 24 V BLDC motor gate drivers for HVAC blowers and pump controllers. IC Role / Device Role / Timing Role: Fast-turning PNP transistor delivering precise timing-controlled current pulses to motor phase windings. Use Value: 50 ns turn-on and 500 ns storage time enable accurate PWM edge placement within 100 ns windows, reducing torque ripple. |
Use Scenario: Output stage switching in 48 V telecom inverters converting battery power to AC for backup systems. IC Role / Device Role / Timing Role: High-current PNP switch handling repetitive 5 A peak loads with low thermal resistance via exposed collector tab. Use Value: 20 W TC=25°C power dissipation rating and 150°C max Tj allow sustained 4 A operation with 25°C/W heatsink, avoiding derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP high-current switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 2SB1203S-E | Identical electrical specs and TP package; Pb-free only (no halogen restriction) | Same relay driver, converter, and inverter use cases; suitable where RoHS6 suffices without halogen-free requirement | Select 2SB1203S-E when halogen-free certification is not mandated by end-equipment environmental standards |
| MJD2955G | –60 V VCEO, –10 A IC, –1.2 V VBE(sat), TO-252 (DPAK); higher current but higher VCE(sat) (–1.1 V min) | Better for >5 A loads but less efficient below 3 A due to higher conduction loss; requires larger PCB footprint | Choose MJD2955G only when absolute maximum current >5 A is required and thermal budget allows higher VCE(sat) penalty |
Compared with 2SB1203S-H, 2SB1203S-E offers identical performance without halogen-free assurance, while MJD2955G trades lower saturation voltage for higher current rating and larger DPAK footprint-making 2SB1203S-H optimal for space-constrained, efficiency-critical 3–5 A PNP switching.
Availability
2SB1203S-H is available at Aetrix Electronics and suitable for relay drivers, DC-DC converters, and industrial inverters requiring stable component supply, halogen-free compliance, and TO-251-compatible surface-mount packaging.
Supply support for 2SB1203S-H includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud power markets.
The 2SB1203S-H belongs to onsemi's general-purpose bipolar transistor family engineered for high-reliability, high-current switching in industrial controls and power conversion-emphasizing low VCE(sat), fast timing, and robust thermal performance.
FAQ
What is the package type and lead finish of 2SB1203S-H?
The 2SB1203S-H uses the TP package (JEDEC TO-251, JEITA SC-64), a 4-pin surface-mount outline with exposed collector tab. Its lead finish is Pb-free and halogen-free, confirmed by the "-H" suffix per onsemi's EN2085C specification and shipping documentation.
Does 2SB1203S-H have the same pinout as 2SD1203T-H?
No-2SB1203S-H is a PNP transistor with pin 1=Base, pin 2=Collector, pin 3=Emitter, pin 4=Collector; 2SD1203T-H is its NPN complement with identical TP package but reversed polarity and same physical pinout. Both share pin 1=Base, pin 2=Collector, pin 3=Emitter, pin 4=Collector, enabling matched pair layout.
What is the maximum junction temperature and thermal resistance of 2SB1203S-H?
The 2SB1203S-H has a maximum junction temperature (Tj) of 150°C and a thermal resistance RθJC of 0.5°C/W (typical) from junction to case, derived from its 20 W PC rating at TC = 25°C. This enables direct mounting to copper pour or heatsinks without thermal interface material in many applications.
How does the hFE ranking system apply to 2SB1203S-H?
The 2SB1203S-H is classified by hFE at –0.5 A: Rank S corresponds to hFE = 140–280, ensuring predictable gain in linear amplification or precision current-source designs. The "S" in the part number explicitly denotes this hFE bin, verified per onsemi's No.2085-3/10 test data.
Can 2SB1203S-H be used in parallel with another 2SB1203S-H for higher current?
Yes-2SB1203S-H supports paralleling due to its excellent hFE linearity and low VCE(sat) variation. Onsemi's datasheet shows matched VCE(sat) distribution (–220 to –400 mV) and consistent fT, enabling stable current sharing when external base resistors are balanced and thermal coupling is maintained.
2SB1203S-H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-251-3 Short Leads, IPAK, TO-251AA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 5 A
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Vce Saturation (Max) @ Ib, Ic:
- 550mV @ 150mA, 3A
- Current - Collector Cutoff (Max):
- 1µA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 140 @ 500mA, 2V
- Power - Max:
- 1 W
- Frequency - Transition:
- 130MHz
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TP
2SB1203S-H FAQ
1.How can I place an order for 2SB1203S-H through Aetrix?
Please submit a Request for Quotation (RFQ) for 2SB1203S-H on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 2SB1203S-H reliable?
The price and inventory of 2SB1203S-H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SB1203S-H is usually 5 days.
3.What payment methods are accepted for 2SB1203S-H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SB1203S-H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 2SB1203S-H?
2SB1203S-H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 2SB1203S-H order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 2SB1203S-H?
For technical support, including 2SB1203S-H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SB1203S-H requirements.
6.How does Aetrix verify that 2SB1203S-H is sourced from the original manufacturer or authorized distributors?
All 2SB1203S-H products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 2SB1203S-H meets industry standards.
7.What is the process for return or replacement of 2SB1203S-H?
All 2SB1203S-H units undergo pre-shipment inspection (PSI). If there is an issue with 2SB1203S-H, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 2SB1203S-H part is unused and in its original packaging.
Return procedure for 2SB1203S-H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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